Hydraulic pumping unit for feeding a hydraulic tilting device

Abstract

The invention relates to a hydraulic pumping unit for feeding the hydraulic tilting cylinder(s) of a vehicle having a tilting cab, having a housing (1), a displacement body mounted for movement in a pumping chamber within the housing (1), a control valve having a bore in connection with the pumping chamber and a control valve body (2) within the bore, the control valve body (2) being provided, at an end (3) projecting beyond said housing (1), with a handle by means of which the control valve body (2) may be turned between at least two positions operative to tilt the cab from the drive position and to tilt the cab back into the drive position of the vehicle respectively. In accordance with the invention, the handle has an inner part (A) that is fixedly connected with the control valve body, and an outer part (B) which encloses the inner part (A) in a free rotating manner and is mounted to be coupled with the inner part by means of a key-operated lock cylinder (24), the outer part (B) forming the handle.

We claim: 
     
       1. A hydraulic pumping unit comprising a pumping unit housing, a control valve body within said housing and having an end projecting beyond said housing with a handle at said end by means of which the control valve body is turned between at least two positions relative to said housing, characterized in that the handle comprises an inner part that is fixedly connected with the control valve body, and an outer part enclosing said inner part in a free rotating manner, said outer part being coupled with said inner part by means of a key-operated lock cylinder, said outer part forming the handle. 
     
     
       2. A hydraulic pumping unit according to claim 1, characterized in that the inner part of the handle is cup-shaped and is provided at its inner circumferential wall with axially and radially extending ribs with slots therebetween, whereas the outer part is cap-shaped and provided with a central portion that extends from the upper cap wall inwardly, into the cup-shaped inner part, said central portion containing a key-operated cylinder lock, the rotary part of which actuates a bolt which is radially movable between an operative position in which it engages one of the slots of the inner part and an inoperative position out of engagement with the inner part. 
     
     
       3. A hydraulic pumping unit according to claim 1, characterized in that the outer part is formed of plastics material and is provided at one end with an inwardly extending locking flange, which is attached to said part by heat sealing and engages under an outwardly extending rim portion of the cup-shaped inner part.